Status Codes

The MCB API uses standard HTTP response codes. Any 2xx response is successful. A 4xx means that there was an error with the data provided (like an invalid routing number). These errors can sometimes be handled programmatically by your application when we provide an error reason. A 5xx error means we encountered an error in our software, which will work to fix immediately.

A table of status codes and their meanings can be found below.

2xx Success

Status Code

Description

200 OK

The request succeeded.

201 Created

The request succeeded and the new resource was created.

4xx Client Errors

Status Code

Description

400 Bad Request

Data was invalid or missing required parameters.

401 Unauthorized

The API key was invalid.

403 Forbidden

The account does not have access to the requested resource.

404 Not Found

The resource that was requested could not be found.

5xx Server Errors

Status Code

Description

500 Internal Server Error

Our server encountered an error while processing your request. We will be notified and work on a fix immediately.

502 Bad Gateway

Our server encountered an error while processing your request. We will be notified and work on a fix immediately.

503 Service Unavailable

Our server encountered an error while processing your request. We will be notified and work on a fix immediately.

504 Gateway Timeout

Our server encountered an error while processing your request. We will be notified and work on a fix immediately.

Errors

A list of common error codes within the MCB API can be found below

Error Code

Description